Question

A machine is 12% efficient. If useful work done by the machine is 6 joules then calculate the total energy
consumed by the machine.
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Answer 1

Since work is the change in kinetic energy, the efficiency of a machine can be stated as the percentage of the output work divided by the input work minus the work lost from to friction and heat. Multiply Eff by 100% to get the efficiency percentage.

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Answer 2

Explanation:

12×100=6 joule /total energy

1200total energy = 6 joule

total energy= 6joul/1200

total energy= 0.005